Type-writing machine.



No. 887,419. PATENTED MAY 12, 1908. H. s. MoGORMAOKf TYPE WRITING MACHINE. 7

APPLICATION FILED HAY 2,}907.

nanny sMccoRnAcK, or New roan, a.

STATES PATENTOFFICE.

Y., ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y. A CC-RPORATION OF NEW JERSEY. I

TYPE-WRITING- mormm. Y f i all whom it may concern: Be itknown that I, ll. 'zm' S. McConarson, a citizen of the United States, residing New York, in the county of New York and Mate of \ew York, have invented certain new and useful Improvements in Type-Writ ing Machines, of which the following is a s peoification.

improved, simplified and easily operable "1 :ans for rotating the platen back to receive anew bill and then forward to bring the bill V to tinting position.

cool-ding to the present invention, a

crank is mounted upon a platen frame, but r out of connection with t e platen; and a single swinging movement of the crank acin either directizm independently of the Ml),- which isproYidfJl-with afinger-pjece COIDIIDllSilBS the two-fold object of connecting the crank to the-platen, and then rotating th platen. It is thus possible by a single cram movement to rotate the platen hack to the (lGSll'GCl pos1t1on this lie-mg an extremely 1 simple operation;

In the preferred form of the invention, the crank is mounted loosely upon the platen,

and a pawl is pivoted upon the crank in position to engage a toothed wheel, the latter bein fixed to the platen. A spring normally ho ds the lpawl out of engagement with the toothed w reel, but a sing c movement of the crank throws the awl into engagement with i the toothed whee and such engagement ls l mechanically maintained until the crank is swing back to normal position, whereupon said spring throws the pawl out of engagement with the toothed wheel, and also serves to latch the crank in its normal position.

In the accompanying drawings, Figure l is a lan view of the platen frame of an 0 Un erwoodtypewriting machineprovided with my improvements. 1g. 2 is an end Specification of Letters Patent.

. Application filed Kay 2. 1907. Serial No. 371,377.

l l l pawl thereon. tron showmg the crank-me hsnism.

axle 2 iournaled in the ends 3, 4, of a platen finger-heel 6 thereon by means of which the -vardly to an unlimited extent. is also provided with the usual line-spacing devices, of which a toothed line-space wheel 7 and nyieldin dc-tent S therefor are seen at Fi 1. Said '1'" shown. the platen axle is secured 5- screws 9 a hub or sleeve 10 in the outer end of which is secured a short stem 11, by means of a pin 1? the platen axle 2 and carrying a finger wheel 13 Upon the stem 11 is secured a wheel 14 aving teeth agreeing in. masher with the ecth on the line-space wheel I.

T 1e wheel l4 is rotatable bymeans of-a- *pawl 16 having a tooth 17 to engage the teeth of the wheel, but normally disen The usual 0}lilhlflCfi-l platen 1 of an Undeii wood tvpewritmg machine is fixed upon an platen may be rotated forwardly or back:

The platen. a. a

' Patented sm ie, 190a.

crank. Fig. 4 is an enlarged.perspectirefb. Vi w of the nuhortlon of the crank and the ug. 5 1s a longitudinall'seca frame 5, the end of the axle prog'ecting, through the platen frame end 3 having a,

ineespaee wheel is advanced. intermittently b a pawl and lover, not

lipea the other injecting-end of said stem being in effect a continuation of I I SO This wheel 1S r1 udly secured to the stem 11 by a pin 15,

; gaged therefrom, as seen at F is. to. permit l independent rotation of the wli i 1 4 ,.*.'-.d the i plat-en 1.

' outer end of thesiceve 10. In order to effect backward rotation of lhe platen the crank Ls swung from its normal L Said pawl is pivoted at to a: crack 1. having a hub 29 to fit iponfhe.

rear osition at Fig. 3 forward}? as at Fig.2,

the nrst portion of the movement of the move into engagement with the teeth 15 of g crank causing the tooth 11 or the pawl to i l the wheel 14. Sa1d pawl carries'a pin 21", i which is normally pressed by a spring 22 into i a notch 23 formed in a motionless disklike member 34 mounted uponthe uuterportionm l fhen the (n-111k starts for:

made the subject of this ap lication; the -.!3,- and thrreafter travels in an. annular crank being shown as connector to the platen groove 2:5'eut 1n thejace of the member, 24: and rotating the same backwardly to the woncentmc fllll the plat-emails:'2,-th e. outer;

proper position for the insertion of a bill hrlswall of said groom-acting to cmfine the pawl.

the machine. Fig, 3 is a View similar to Fig; [.-so.that its tuullih L7, cannot esca from zthek hut showing the crank in a normal posiwheel 14, and hence the platen must-rotate tiOll of disuse, to permit rotation of the platen backward-l. i 'flififirwardl withufthecrank: q

- minal The movements of the crank are limited b a stop 27'mounted upon an arm 28 which is a1so-p1voted upon the sleeve 10 said arm being confined between-the crank hub 20 and thegrooved disk-member 24, and all three bein confined between the wheel 14 and a shou der 19 formed u on the sleeve 10. The

stop'is-provided wit a releasable in 30 to engage 'any of a series of holes 31 ormed in the gro'oved member 24,-the latter being prevented from rotating by means of a link 32 pivotedat33 to the member 24 and at 34 to the laten frame.

'1 e stop 27 having been set to the required position, as at Figs. 2 and 3, the handle 26 is grasped b the operator to swing the same towards t e front of the carriage and downwardl as shown by the arrow at Fig. 2. The initia movement of the crank forces the pawl to engage the wheel 14, so that the latter and the llplaten are caused to rotate with the cran in a direction to turn the platen backwardly to receive a new bill, this motion of the platen continuing until the'crank 19 is arrested by the stop 27. Upon the bill being inserted, the crank isswung through its return stroke backfto initial position, the pin or projection 21 riding in contact with the outer wall of the-groove 25 which keeps the pawl 16, lockedto the wheel 14. At the ternk hrtionpof the' retuarrli3 stgoke of. tl2ie cra epin 21 iseng'age y t espnng 2 and snapped u into the notch 23, thereby releasing he w eel 14 and also arrestin the crank, which thereafter is yieldingly he d by said spring in normal osition, as at Fig. 3.

Thus, it will be seen, t at by a sim 1e mechanism provision is made whereby t e o erator, w en desiring to rotate the-platen ackwardly, needs 0 y to-grasp'the crank, and swing it in a sin 1e direction about the platen axis 2 automatically effecting-the locking of the crank to the platen, and maintaining such lock connection until the crank is swung back again, as far as it will go, whereupon the first line of writing may e begun upon the bill.

Variations may be resorted to within the scope of the invention, and portions of the im rovements may be used without others.

aving thus described my invention, I claim:

1. In a typewriting machine having a revoluble platen, the combination with a toothed wheel connected to the platen to revolve therewith, of a platen oscillator, a tooth normally disengaged from said toothedwheel, means to enable a single movement of said platen-oscillator first to effect engagement between said tooth and said toothed wheel, and then to revolve the wheel and platen, and means to maintain the en agement of the tooth and the wheel during 0th the forward and backward strokes of the oscillator.

2. In a typewriting machine having a revoluble platen, the combination with a toothed wheel connected to the platen to revolve therewith, of a platen-oscillator, a tooth normally disengaged from said toothedwheel, means to enable-a single movement of said platen-oscillator first to effect engagement between said tooth and said toothedwheel, and then to revolve the wheel and platen, means to maintain mechanicall the engagement of the tooth and the whee during both the forward and backward strokes of the oscillator, and means to effect disengagement of the tooth from the wheel upon return of said oscillator to normal position.

3. In a typewritin machine having a revoluble laten, the com ination with a toothedwheel connected to the platen to revolve therewith, of a pawl having a tooth, a spring normally holding said pawl out of en agement with said toothed wheel, a rotatable platenoscillator, means for enabling the initial portion of the rotation of said oscillator to move said awl tooth into engagement with said whee and for enabling the continued rotation of said oscillator to act through said pawl to revolve said fplaten a stop for arresting the movement 0 the platen and oscillator, and means to maintain the en agemcnt of the pawl with the wheel durin 0th the forward and backward strokes of t e oscillator.

4. In a typewritin machine having a revoluble laten, the com ination with atoothedwheel connected to the platen to revolve therewith, of a crank mounted for revolution with said toothed-wheel, a pawl upon said crank and normall out of engagement with said toothed-whee means for enabling the crank by a swinging movement thereof to force said pawl into engagement with said toothed-wheel, and means for maintainin mechanicall the engagement of the paw and wheel, uring the excursion of said crank away from and back to normal position.

5. Ina typewritin machine havingarevo- 110 lublelplaten, the com ination with a toothedwhee connected to the platen to revolve therewith, of a crank mounted for revolution with said toothed-wheel, a pawl pivoted to said crank and normall out of enga ement 5 with said toothed-wheel a spring for olding said crank stationary, and said pawl disengaged from said toothed wheel durin the usual line-spacing movements of the p aten, means for enabling a turning movement of 1 the crank to force said pawl into on agement with said wheel, means for mec anically maintaining the engagement of the pawl and wheel during the excursion of said crank away from and back to.normal position, and 125 a stop for limiting the initial stroke of the crank.

6. In a typewritin machine having a revoluble platen and a p aten axle, the combination with a toothed-wheel fixed upon said 130 .axle, of a crank loosely supported to swing I about said axle. a pawl pivoted to said crank, I a pin projecting from said pawl, and a fixed I part having a notchinto which said pin is pressed by a spring, both to hold the awl away from the wheel, and also to llOlt the crank stationary, during the usual line-byline revolution of the platen, said pin bein releasable from said notch by means of a pal on the crank, and said fixed part having a circular guiding surface concentric with said axle to engage said pin to lock the pawl to the wheel. a

7. In a t ypcwriting machine having a revoluble platen, the combination with a toothedwheel connected to the platen, of a crank looselysu p ported to revolve with said toothed wheel, a )awl pivoted to said crank, means to hold the pawl away from the wheel, and

also to hold the crank stationary during the usual line-by-line revolution of the platen, said crank being efiectix e to force the pawl into engagement with the wheel, and a circular guidii'ig surface concentric with the wheel to lock the pawl to the wheel.

8. In a t-ypewritin machine having arevoluble platen and a platen axle, the combination with a toothed-wheel fixed upon said] axle, of a crank loosely supported upon said axle, a pawl pivoted to said crank, means to carry the pawl around said axle, a pin'projecting from said pawl, and a fixed part having a notch into which said pin is pressed by a spring to hold the pawl away from the wheel, said crank being t-di'ective to force said pin out of said notch and to engage the pawl with the wheel, and said fixed part having a circular guiding surface concentric with said axle to engage said pin to lock the pawl to the wheel. f

9. In a t ypewriting machine having a revoluble )laten and a crank normally disconnccted from the platen, of means yieldingly holding the crank in normal )osition, so that a swing of the crank itself will release it from said yielding means, means rendered effective at said relcasin operation for connect ng the crank to the platen, and means for me- "ehanically maintaining the connection of the crank to the platen during the excursion of the crank away from and back to normal pos. 11.1mm: F. A GnosE. 

